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  1. M

    PRV replaced on combi, pressure still dropping - what next?

    I've recently had some problems with system pressure regularly dropping on my combi (Ariston Microgenus) typically from 1 down to 0.2 bar over 2 days. Our plumber has replaced the PRV on it but the problem persists. Boiler is connected to a UFH manifold. The manifold has its own PRV which...
  2. M

    Combi + UFH manifold, losing pressure daily

    The situation: An Ariston Microgenus HE 24 connected to a Kee Triple Tube UFH manifold. The problem: Boiler is regularly losing pressure, we currently have to refill it to 1-1.5 bar every 3 days or so, and if we forget we'll eventually get the E02 error. Not a problem, just an...
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